On tonight's episode of Inside Amy Schumer she interviewed a comedian (Kurt Metzger) that was talking about having an open relationship with his wife. At one point he said (paraphrasing) 'I was raised to believe that a monogynous relationship is the best thing there is ... I guess that's fine if you're going to stay in your doomsday cult all your life...'
Looked him up and sure enough he was a born-in. It's crazy how many there are out there.